在Geo-Congress 2022会议上,德克萨斯大学奥斯汀分校(University of Texas at Austin)的Ellen Rathje(Ph.D., P.E., F.ASCE)获得了Ralph B. Peck奖【岩土工程讲座---Ralph B. Peck Award (1999-2022)】,以表彰她通过案例历史推动地震场地反应分析,她发展的案例历史为区域地震评估提供信息,以及她在促进案例历史数据电子出版的领导作用。她的演讲题目是"Site Response Analysis: Does it Work?(场地反应分析: 它是否有效?)"
Bray教授的Seed Lecture【2022 Seed 讲座---液化影响评价(Evaluating the Effects of Liquefaction)】侧重于讲述液化的工程效应,即液化对地表建筑物的影响,而Dr. Rathje的演讲侧重于讲述地震波的传播过程,即场地反应分析【多维和非线性的场地反应分析(Site Response Analysis)】。
她的演讲分为三个部分:在强调了案例研究在岩土工程中的作用之后,讲述了场地反应分析(43分钟),然后简要描述了案例历史数据的电子收集工作(8分钟), 最后给年轻的岩土工程师提出了一些职业发展的建议(9分钟)。场地反应分析部分的主要论点总结如下:
Part I
Introduction
(1) Role of case histories in computational simulation
(2) Site effects and site response
(3) Site response complexities
(4) One-dimensional site response analysis
(5) What is a case history for site response?
Part II
Evaluating site response analysis
(1) When is the 1D assumption valid?
(2) Horizontal-Vertical Spectral Ratio
(3) Downhole array sites
(4) Amplification and HVSR
Part III
How well does SRA perform at large-intensities?
(1) Modeling nonlinear soil response
(2) Analysis of downhole arrays
(3) Amplification residuals
(4) Consideration of shear strength
(5) Base isolation effect in 1D analysis
Part IV
Role of k in site response studies
(1) Seismological parameter kappa
(2) Influence of k on spectral shape
(3) Relationship with damping
(4) Effect of soil nonlinearity on k
(5) k correction for site response
整个演讲总共1个小时,完整视频261M(50元 donation)。特别值得一提的是Dr. Rathje的讲话非常clear and smooth, 标准的北美职业女性口音,除了专业内容之外,对于需要练习英语演讲和即将去留学的同学来说也是非常好的听说训练材料。